Wind Stress Drag Coefficient Over the Global Ocean PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Wind Stress Drag Coefficient Over the Global Ocean PDF full book. Access full book title Wind Stress Drag Coefficient Over the Global Ocean by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Get Book Here
Book Description
Interannual and climatological variations of wind stress drag coefficient are examined over the global ocean from 1998 to 2004. Here CD is calculated using high temporal resolution (3- and 6-hourly) surface atmospheric variables from two datasets: 1)the 40-yr European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40) and 2) the Navy Operational Global Atmospheric Prediction System. The stability-dependent CD algorithm applied to both datasets gives almost identical values over most of the global ocean, confirming the validity of results. Overall, major findings of this paper are as follows: 1) the CD value can change significantly (e.g, greater than 50%) on 12-hourly time scales around the Kuroshio and Gulf Stream current systems: 2) there is strong seasonal variability in CD, but there is not much interannual change in the spatial variability for a given month; 3) a global mean Cd ~ 1.25 x 10-3 is found in all months, while CD is less than or equal to 1.5 x 10-3 is prevalent over the North Pacific and North Atlantic Oceans and in southern high-latitude regions as well. and CD is less than or equal to 1.0 x 10-3 is typical in the eastern equatorial Pacific cold tongue; and 4) including the effects of air-sea stability on CD generally causes an increase of less than 20% in comparison to the one calculated based on neutral conditions in the tropical regions. Finally, spatially and temporally varying CD fields are therefore needed for a variety of climate and air-sea interaction studies.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Get Book Here
Book Description
Interannual and climatological variations of wind stress drag coefficient are examined over the global ocean from 1998 to 2004. Here CD is calculated using high temporal resolution (3- and 6-hourly) surface atmospheric variables from two datasets: 1)the 40-yr European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40) and 2) the Navy Operational Global Atmospheric Prediction System. The stability-dependent CD algorithm applied to both datasets gives almost identical values over most of the global ocean, confirming the validity of results. Overall, major findings of this paper are as follows: 1) the CD value can change significantly (e.g, greater than 50%) on 12-hourly time scales around the Kuroshio and Gulf Stream current systems: 2) there is strong seasonal variability in CD, but there is not much interannual change in the spatial variability for a given month; 3) a global mean Cd ~ 1.25 x 10-3 is found in all months, while CD is less than or equal to 1.5 x 10-3 is prevalent over the North Pacific and North Atlantic Oceans and in southern high-latitude regions as well. and CD is less than or equal to 1.0 x 10-3 is typical in the eastern equatorial Pacific cold tongue; and 4) including the effects of air-sea stability on CD generally causes an increase of less than 20% in comparison to the one calculated based on neutral conditions in the tropical regions. Finally, spatially and temporally varying CD fields are therefore needed for a variety of climate and air-sea interaction studies.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Get Book Here
Book Description
The effects of ocean surface currents and dominant waves on the wind stress drag coefficient (C0) are examined over the global ocean. Major findings are as follows: (2) the combination of both ocean wave and current speeds can result in reductions in daily C0 (>10%), but the notable impact of the latter is only evident in the tropical Pacific Ocean; (2) the presence of waves generally makes winds weaker and C0 lower almost everywhere over the global ocean; (3) strong ocean currents near the western boundaries (Kuroshio and Gulf Stream) do not substantially influence C0 since the winds and currents are not always aligned; and (4) the change in speed used in bulk flux parameterization also causes large changes in fluxes. Globally, the combined outcome of ocean currents and waves is to reduce C0 by about (2%), but spatial variations (0% to 14%) do exist.
Author: Ian S. F. Jones
Publisher: Cambridge University Press
ISBN: 0521662435
Category : Mathematics
Languages : en
Pages : 277
Get Book Here
Book Description
A comprehensive 2001 volume for researchers and graduate students in oceanography, meteorology, fluid dynamics and coastal engineering.
Author: Ryszard Staroszczyk
Publisher: Springer
ISBN: 3030030385
Category : Science
Languages : en
Pages : 344
Get Book Here
Book Description
This book presents the concepts and tools of ice mechanics, together with examples of their application in the fields of glaciology, climate research and civil engineering in cold regions. It starts with an account of the most important physical properties of sea and polar ice treated as an anisotropic polycrystalline material, and reviews relevant field observations and experimental measurements. The book focuses on theoretical descriptions of the material behaviour of ice in different stress, deformation and deformation-rate regimes on spatial scales ranging from single ice crystals, those typical in civil engineering applications, up to scales of thousands of kilometres, characteristic of large, grounded polar ice caps in Antarctica and Greenland. In addition, it offers a range of numerical formulations based on either discrete (finite-element, finite-difference and smoothed particle hydrodynamics) methods or asymptotic expansion methods, which have been used by geophysicists, theoretical glaciologists and civil engineers to simulate the behaviour of ice in a number of problems of importance to glaciology and civil engineering, and discusses the results of these simulations. The book is intended for scientists, engineers and graduate students interested in mathematical and numerical modelling of a wide variety of geophysical and civil engineering problems involving natural ice.
Author: Dennis L. Hartmann
Publisher: Academic Press
ISBN: 0080571638
Category : Science
Languages : en
Pages : 425
Get Book Here
Book Description
Global Physical Climatology is an introductory text devoted to the fundamental physical principles and problems of climate sensitivity and change. Addressing some of the most critical issues in climatology, this text features incisive coverage of topics that are central to understanding orbital parameter theory for past climate changes, and for anthropogenic and natural causes of near-future changes--Key Features* Covers the physics of climate change* Examines the nature of the current climate and its previous changes* Explores the sensitivity of climate and the mechanisms by which humans are likely to produce near-future climate changes* Provides instructive end-of-chapter exercises and appendices
Author: Peter Janssen
Publisher: Cambridge University Press
ISBN: 0521465400
Category : Science
Languages : en
Pages : 310
Get Book Here
Book Description
This book was published in 2004. The Interaction of Ocean Waves and Wind describes in detail the two-way interaction between wind and ocean waves and shows how ocean waves affect weather forecasting on timescales of 5 to 90 days. Winds generate ocean waves, but at the same time airflow is modified due to the loss of energy and momentum to the waves; thus, momentum loss from the atmosphere to the ocean depends on the state of the waves. This volume discusses ocean wave evolution according to the energy balance equation. An extensive overview of nonlinear transfer is given, and as a by-product the role of four-wave interactions in the generation of extreme events, such as freak waves, is discussed. Effects on ocean circulation are described. Coupled ocean-wave, atmosphere modelling gives improved weather and wave forecasts. This volume will interest ocean wave modellers, physicists and applied mathematicians, and engineers interested in shipping and coastal protection.
Author: Kevin E. Trenberth
Publisher:
ISBN:
Category : Dynamic climatology
Languages : en
Pages : 104
Get Book Here
Book Description
Author: Bernard Le Méhauté
Publisher: Harvard University Press
ISBN: 9780674017399
Category : Political Science
Languages : en
Pages : 1340
Get Book Here
Book Description
Author: Henry F. Diaz
Publisher: Springer Science & Business Media
ISBN: 1402029438
Category : Science
Languages : en
Pages : 515
Get Book Here
Book Description
The book examines potentially important factors that may have affected the Hadley and Walker Circulations and evaluates changes in the Hadley Circulation and the monsoons as simulated by coupled models of past climate conditions, and predicted future conditions under an enhanced greenhouse effect. This book is meant to serve as a fundamental reference work for current and future researchers, graduate students in the atmospheric sciences and geosciences, and climate specialists involved in interdisciplinary research.
Author: John Marshall
Publisher: Academic Press
ISBN: 0080954561
Category : Science
Languages : en
Pages : 345
Get Book Here
Book Description
For advanced undergraduate and beginning graduate students in atmospheric, oceanic, and climate science, Atmosphere, Ocean and Climate Dynamics is an introductory textbook on the circulations of the atmosphere and ocean and their interaction, with an emphasis on global scales. It will give students a good grasp of what the atmosphere and oceans look like on the large-scale and why they look that way. The role of the oceans in climate and paleoclimate is also discussed. The combination of observations, theory and accompanying illustrative laboratory experiments sets this text apart by making it accessible to students with no prior training in meteorology or oceanography.* Written at a mathematical level that is appealing for undergraduates andbeginning graduate students* Provides a useful educational tool through a combination of observations andlaboratory demonstrations which can be viewed over the web* Contains instructions on how to reproduce the simple but informativelaboratory experiments* Includes copious problems (with sample answers) to help students learn thematerial.
